Glacier National Park weather in December
December in Glacier National Park: freezing, a little rain, with clean air — one of the weakest months to visit.
#12 of 12 months in Glacier National Park · #551 of 604 destinations to visit in December · comfort 36/100 (tier F)
Updated June 2026 · climate normals from ERA5 reanalysis
Glacier National Park climate normals — December
| Daytime high | -5°C / 22°F | 🥶 freezing |
|---|---|---|
| Nighttime low | -10°C / 13°F | |
| Feels like (high) | -10°C / 14°F | |
| Rainfall | 76 mm / 3 in | 🌦 some rain |
| Rainy days | 16 days | |
| Humidity | 86% | 💦 very humid |
| Dew point | -11°C / 12°F | |
| Sunshine | 4.3 h/day | |
| Daylight | 8.4 h | |
| Wind | 14 km/h / 9 mph | |
| Snowfall | 86.2 cm / 33.9 in | |
| Air quality (US AQI) | 37 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Glacier National Park in December — FAQ
- Is December a good time to visit Glacier National Park?
- December in Glacier National Park: freezing, a little rain, with clean air — one of the weakest months to visit. It ranks #12 of 12 months for Glacier National Park on SeasonMap's comfort score (36/100).
- What is the weather like in Glacier National Park in December?
- In December, Glacier National Park averages a daily high of -5.5°C and a low of -10.5°C, with about 75.5 mm of rain over roughly 15.8 rainy days.
- What is the air quality in Glacier National Park in December?
- Glacier National Park has a mean US Air Quality Index of about 37 in December.
- Does it snow in Glacier National Park in December?
- Glacier National Park sees roughly 86.2 cm of snowfall in December.